<template>
   <div>
      <!-- 面包屑导航区 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
         <el-breadcrumb-item :to="{ path: '/Roles' }">首页</el-breadcrumb-item>
         <el-breadcrumb-item>权限管理</el-breadcrumb-item>
         <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--    卡片视图-->
      <el-card>
         <!--      添加角色按钮区域-->
         <el-row>
            <el-col>
               <el-button type="primary">添加角色</el-button>
            </el-col>
         </el-row>
         <!--      角色列表区域-->
         <el-table :data="rolelist" border stripe>
            <!--            箭头展开列-->
            <el-table-column type="expand">
               <template slot-scope="scope">
                  <!-- {{scope.row}} -->
                  <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id"
                     :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']">
                     <!-- 渲染一级权限 -->
                     <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                        <i class="el-icon-caret-right"></i>
                     </el-col>
                     <!-- 渲染二级和三级权限 -->
                     <el-col :span="19">
                        <!--通过for循环渲染二级三级权限-->
                        <el-row v-for="(item2, i2) in item1.children" :key="item2.id"
                           :class="[i2 === 0 ? '' : 'bdbottom', 'vcenter']">
                           <el-col :span="6">
                              <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                                 {{item2.authName }}
                              </el-tag>
                              <i class="el-icon-caret-right"></i>
                           </el-col>
                           <el-col :span="18">
                              <el-tag v-for="(item3, i3) in item2.children" :key="item3.id" type="danger" closable
                                 @close="removeRightById(scope.row, item3.id)">
                                 {{ item3.authName }}
                                 <i class="el-icon-caret-right"></i>
                              </el-tag>
                           </el-col>
                        </el-row>
                     </el-col>
                  </el-row>
               </template>
            </el-table-column>
            <!--索引列-->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
               <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                  <el-button type="success" icon="el-icon-delete" size="mini">删除</el-button>
                  <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">
                     分配权限
                  </el-button>
               </template>
            </el-table-column>
         </el-table>
      </el-card>
      <!-- 权限分配的弹出对话框 -->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRghtDialogClosed">
         <!-- 树形控件 -->
         <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
            :default-checked-keys="defKeys" ref="treeRef"></el-tree>
         <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
         </span>
      </el-dialog>
   </div>
</template>

<script>
export default {
   data() {
      return {
         // 所以角色列表
         rolelist: [],
         // 控制分配权限的对话框的显示或隐藏
         setRightDialogVisible: false,
         // 所有分配权限的数据
         rightslist: [],
         // 树形控件的属性绑定对象
         treeProps: {
            label: 'authName',
            children: 'children',

         },
         // 默认勾选的key节点的数组 default-expanded-keys绑定的
         defKeys: [],
         // roleId: '',
         roleId: [], //当前即将分配的角色id

      };
   },
   created() {
      this.getRolesList();
   },
   methods: {
      async getRolesList() {
         const { data: res } = await this.$http.get("roles");
         console.log(res);
         if (res.meta.status !== 200) {
            return this.$message.error("获取数据失败！");
         }
         this.rolelist = res.data;
      },
      // 根据ID删除对呀的权限
      async removeRightById(role, rightId) {
         // 弹出确认框 优化是否要删除
         const confirmResult = await this.$confirm(
            "此操作将永久删除该文件, 是否继续?",
            "提示",
            {
               confirmButtonText: "确定",
               cancelButtonText: "取消",
               type: "warning"
            }
         ).catch(err => err); //捕获了用户的取消行为
         if (confirmResult !== 'confirm') {
            return this.$message.info("取消了删除！");
         }
         // this.$message.success('删除成功！')
         // 确认的时候 发起请求
         // this.$http.delete(`roles/:roleId/rights/:rightId`)
         const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
         // console.log(res);
         if (res.meta.status !== 200) {
            return this.$message.error('删除权限失败！')
         }
         // console.log('成功');
         // this.getRolesList()  //导致重新渲染数据展开的权限区域折叠
         //不需要全部页面刷新，因为返回的数据是最新的权限数据 ，返回的赋值给当前的 role.children = res.data
         role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
         this.roleId = role.id
         // 获取所有的权限的数据
         const { data: res } = await this.$http.get('rights/tree')
         console.log(res);
         if (res.meta.status !== 200) {
            this.$message.error('获取权限数据失败！')
         }
         // 把获取到的数据存储再笨的data
         this.rightslist = res.data
         // 递归获取三级节点的Id并保存到defKeys数组中  这样一打开分配对话框就会把数组里的id给勾选上
         //  关闭还要把数组清空 要不然下次打开会累加
         this.getLeafKeys(role, this.defKeys)
         this.setRightDialogVisible = true
      },
      // 通过递归函数的方法获取所有三级默认勾选的三级id，存储再递归里，再通过递归传给defKeys=[]
      getLeafKeys(node, arr) {
         // 如果当前 node 节点不包含 children 属性，则是三级节点
         if (!node.children) {
            return arr.push(node.id)
         }

         // 不是三级节点 递归调用
         node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听关闭分配权限对话框的关闭事件
      setRghtDialogClosed() {
         this.defKeys = []  //关闭对话框后清空数组
      },
      // 点击确定角色分配权限
      async allotRights() {
         // 先拿到全选半选所有勾选的id
         const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),   //全选id，通过展开运算符放到数组中
            ...this.$refs.treeRef.getHalfCheckedKeys()   //半选中的所有勾选id通过展开运算符放在数组里
         ]
         const idStr = keys.join(',')  //把keys里的两个2id逗号分开 发送请求（接口要求）
         const { data: res } = await this.$http.post(
            `roles/${this.roleId}/rights`, { rids: idStr })
         if (res.meta.status !== 200) {
            return this.$message.error('分配权限失败！')
         }
         this.$message.success('分配权限成功！')
         this.getRolesList()     //刷新数据渲染
         this.setRightDialogVisible = false  //对话框关闭
      }

   }
};
</script>

<style lang="less" scoped>
.el-tag {
   margin: 7px;
}

.bdtop {
   border-top: 1px solid whitesmoke;
}

.bdbottom {
   border-bottom: 1px solid whitesmoke;
}

.vcenter {
   display: flex;
   align-items: center;
}
</style>
